The story centers on "The Junk," a high-tech suit that provides superhuman abilities such as strength, agility, weapons systems, and communication capabilities. There are currently two units in existence, both located in Japan - one white and one black. Asamiya describes the eye design as a mono-eye style, but it actually has two eyes. The suits require an eight-hour charging period before delivering just one hour of performance. Although they are free to use, users must submit a report to the manufacturer, which has not yet been identified.
Junk: Record of the Last Hero was published in English by Dr. Master Productions from December 1, 2006 to July 8, 2008. A complete boxset was also released by the same published on November 12, 2008.